1-key-exercises are done

Author: RomanSanaye

Sprint-1/1-key-exercises/1-count.js

@@ -4,3 +4,6 @@ count = count + 1;
 
 // Line 1 is a variable declaration, creating the count variable with an initial value of 0
 // Describe what line 3 is doing, in particular focus on what = is doing
+
+// Line 3 is assigning (count + 1) to the variable count. 
+// In other word adding 1 to the variable count.

Sprint-1/1-key-exercises/2-initials.js

@@ -5,7 +5,11 @@ let lastName = "Johnson";
 // Declare a variable called initials that stores the first character of each string.
 // This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
 
-let initials = ``;
+let initials = `${firstName.charAt(0)}${middleName.charAt(0)}${lastName.charAt(0)}`;
+console.log(initials);
+console.log(typeof initials);
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
 
+// I used the mdn documentation to know how to get the first character of a string.
+// I used charAt() method that takes the index of a string and return the character of it.

Sprint-1/1-key-exercises/3-paths.js

@@ -11,13 +11,18 @@
 
 const filePath = "/Users/mitch/cyf/Module-JS1/week-1/interpret/file.txt";
 const lastSlashIndex = filePath.lastIndexOf("/");
-const base = filePath.slice(lastSlashIndex + 1);
+const base = filePath.slice(-8);
 console.log(`The base part of ${filePath} is ${base}`);
 
 // Create a variable to store the dir part of the filePath variable
 // Create a variable to store the ext part of the variable
 
-const dir = ;
-const ext = ;
+const dir = filePath.slice(0, -8);
+const ext = filePath.slice(filePath.length-3);
 
-// https://www.google.com/search?q=slice+mdn
+console.log(`the dir part of filePath variable is ${dir}`);
+console.log(ext);
+
+// https://www.google.com/search?q=slice+mdn
+
+// After studying the slice() method I was able to do this task easily.

Sprint-1/1-key-exercises/4-random.js

@@ -2,8 +2,14 @@ const minimum = 1;
 const maximum = 100;
 
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
+console.log(num);
 
 // In this exercise, you will need to work out what num represents?
 // Try breaking down the expression and using documentation to explain what it means
 // It will help to think about the order in which expressions are evaluated
 // Try logging the value of num and running the program several times to build an idea of what the program is doing
+
+// num is a variable that will be assigned an integer number after the operators are done.
+// Math.floor() rounds a decimal to its nearest number to make it an integer. ex = 1.2 => 1.
+// Math.random() is a method used to create numbers between (0-1) and usually it creates a decimal like (0,2) or etc.
+// each time I run it, I got different number as Math.random() generates different number each time we run it.